[Samba] Fwd: samba & Oracle ACFS Issues

Volker Lendecke Volker.Lendecke at SerNet.DE
Wed Dec 17 00:32:19 MST 2014

On Tue, Dec 16, 2014 at 10:50:10PM +0100, Nacho del Rey wrote:
> Hi Volker and many thanks for your response
> According to your questions
> >Please remove the SO_RCVBUF and SO_SNDBUF entries.
> >Oh, that's ancient. Do you have any possibility to move to
> >"security=user"?
>                  The smb.conf file was inherited from HP-UX system. Ok,
> I'll remove them
> >Did you try "posix locking = no"? That is mostly criticial
> >if you are exporting files from a file system with
> >unreliable locking like for example NFS.
>           There is no NFS at all over the fs. It is only ACFS + samba. We
> tried to disable any interference with posix locks over the ACFS, so the
> parameter was set to no. Is it right?

In your smb.conf, it was set to yes, that's why I was
asking. Setting "posix locking = no" is the right thing to
do in this case. I mentioned NFS just as an example of a
file system where locking can be problematic. It sounds like
ACFS also could have problems here, thus the analogy.

> >Can you see what the smbd hosting such a blocked client does?
> >If it is in D state (according to ps u), it sits in the
> >kernel. If not, you could try stracing the process (strace
> >-ttT -p <pid>) and see what it does. gstack <pid> also helps
> >often.
>    We got the following strace over the samba process 'locked'

The strace looks innocent. Have you been able to see what
state the process was in while the client was blocked?



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